Package javax.persistence.criteria

Examples of javax.persistence.criteria.CriteriaQuery.select()

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    @GET
    public List<Snapshot> all() {
        CriteriaBuilder cb = this.em.getCriteriaBuilder();
        CriteriaQuery q = cb.createQuery();
        CriteriaQuery<Snapshot> select = q.select(q.from(Snapshot.class));
        return this.em.createQuery(select)
                .getResultList();

    }
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        return em.find(Student.class, id);
    }

    public List<Student> findAllStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(Student.class));
        return em.createQuery(cq).getResultList();
    }

    public int countStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
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    }

    public int countStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        Root<Student> rt = cq.from(Student.class);
        cq.select(em.getCriteriaBuilder().count(rt));
        Query q = em.createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }

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        return result;
    }

    public List<Course> findAllCourse() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(Course.class));
        return em.createQuery(cq).getResultList();
    }

    public Course findCourseByName(String cname) {
        CriteriaBuilder cb = em.getCriteriaBuilder();
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        return em.find(Student.class, id);
    }

    public List<Student> findAllStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(Student.class));
        return em.createQuery(cq).getResultList();
    }

    public int countStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
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    }

    public int countStudent() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        Root<Student> rt = cq.from(Student.class);
        cq.select(em.getCriteriaBuilder().count(rt));
        Query q = em.createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }

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        return result;
    }

    public List<Course> findAllCourse() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        cq.select(cq.from(Course.class));
        return em.createQuery(cq).getResultList();
    }

    public Course findCourseByName(String cname) {
        CriteriaBuilder cb = em.getCriteriaBuilder();
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    }

    public int count() {
        CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
        Root<Log> rt = cq.from(Log.class);
        cq.select(em.getCriteriaBuilder().count(rt));
        Query q = em.createQuery(cq);
//        System.out.println("in LogSessionBean.java, the count res is:"+((Long) q.getSingleResult()).intValue());
       return ((Long) q.getSingleResult()).intValue();
    }
}
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    public void testEqualWithAttributeAndLiteral() {
        String jpql = "select a from Account a where a.balance=100";

        CriteriaQuery c = cb.createQuery();
        Root<Account> account = c.from(Account.class);
        c.select(account).where(cb.equal(account.get(Account_.balance), 100));

        assertEquivalence(c, jpql);
    }

    public void testEqualWithAttributeAndAttribute() {
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    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery cq = cb.createQuery();
    Root<Book> candidate = cq.from(Book.class);
    candidate.alias("b");
    cq.select(candidate);

    Query q = em.createQuery(cq);
    List<Book> books = q.getResultList();
    assertNotNull(books);
    assertEquals(3, books.size());
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